Heating attachment for lamp-chimneys.



No. 634,809. Patented Oct. I0, 1899.

H. L. nusms. HEATING ATTACHMENT FDR LAMP CHIIINEYS.

l limim med Apr. 29, 1897.)

(lo Nodal.)

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UNITED STATES PATE T OFFICE.

HENRY L. DU 13015, or PHILADELPHIA, PENNSYLVANIA, ASSIGNOR, BY. MESNE ASSIGNMENTS, TO JOSEPH e. MARINER, or SAME PLACE.

HEATlNG ATTACHMENT FOR LAMP -CHIMNEYS.

SPECIFICATION forming part of Letters Patent No. 634,809, dated October 10, 1899.

Application filed April 29, 1897- SerialNo. 634,427. No model.)

To all whom, it may conce n; 7

Be it known that l, HENRY L. DU BOIS, a citizenof theUnited States, residingat Phila delphia, in the county of Philadelphia and The invention also has for its object to provide an air-heating attachment fora lamp or analogous chimney of such construction and possessing such characteristics that the heat rising through the chimneyimpinges against the imperforate substantially horizontal wall to a hot-air chamber or reservoir supported by the chimney and is widely distributed laterally in all directions into the apartment or room for the purpose ofheating the atmosphere and providing a simplified heater, which can be conveniently and economically manufactured and readily placed upon or removed from a lamp or analogous chimney of any diameter commonly used.

The invention also has for its object to .provide anew and improved metallic casing having an imperforate top wall and a hot-air-distributing chamber and provided with novel and simple means whereby it can be centered upon the upper end of lamp or analogous chimneys of varying diameter or size.

' To accomplish all these objects, myinvention consists in the features of construction and in the combination or arrangement of parts hereinafter described and claimed, reference'loeing made to the accompanying drawings, in which- Figure 1 is a side elevation of my improved 7 heater applied to a lamp-chimney. Fig. 2 is a similar view showing the metallic heater in section. Fig. 3 is a detail top plan view of the collar or ring Support by which the metallic heater-casing is sustained above the lampchimney. Fig. i is a detail sectional view, on an enlarged scale, to more clearly illustrate the construction, whereby the heater-support is adapted to support the heater-casing and to engage the upper end of a lamp-chimney of any size commbnlyused; and Fig. 5 is a detail View of a device designed for lifting the heater-casing while in a hotcondition from the lamp-chimney.

In order to enable those skilled in the art to make and use my invention, I will now describe the same in detail, referring to the drawings, wherein of the metallic heater-casing, which is preferably shaped similar to the frustum of an inverted cone. This casing is formed at the center of its bottom portion with a circular orifice 2, and at its top portion is formed integral with an approximately horizontal wall 3, which is imperforate, so that it will effectually obstruct the ascent of all heat rising from the lam p-chimney, as will hereinafter appear. The side portions of the body 1 at a point below the imperforate top wall 3 is constructed with an annular row of hot-airoutlet orifices or perforations l, which may be of any desired form or shape and be more or less numerous for the purpose of widely distributing the hot air lateral-1y from the heater-body below the imperforate top wall thereof.

The heater-casing may be made in two or more pieces, or it maybe made from a single piece of sheet brass, copper, iron, steel, or tin. If desired, it can be stamped or struck up or otherwise produced to possess substantially the form or shapedescribed and shown.

' The heater may be made of any desired dimensions, according to the size andcapacity of the burner in connection with which it is her or reservoir in which the air will be main-v 5 The numeral 1 indicates the body portion tained at a high temperature and from which such air will be widely distributed into an apartment or room for heating or warming the atmosphere, so that the heater constitutes, in effect, a simplified stove for heating or warming an apartment or room.

The heater-casing described and shown is designed to be supported above the upper end of a lamp-chimney 5 through the medium of a support composed of a collar or ring 6, adapted to enter the orifice 2 in the bottom of the heater. The collar or ring is constructedin an ysuitable manner with a flange, as at 8, designed to rest against the upper edge of the lamp-chimney for supporting the collar or ring 6 thereupon and enabling the latter to sustain the heater above the chimney. The collar or ring is circular in crosssection, and the flange portion 8 is inclined downward and outward, so that it gradually increases in diameter in a downward direction for the purpose of enabling it to be fitted upon lamp-chimneys of varying diameter. The lower end portion of the annular flange 8 is turned into a vertical position to provide a rim 9, which carries any desired number of thumb-screws 10, adapted to hear at their inner ends against the side of the lamp-chimney in such manner that the collar or ring constituting the support for the heater-casing can be centered upon the upper end of the lamp-chimney and be firmly secured in position, so that it will not tilt or become disarranged while in use. I have illustrated four thumb-screws 10; but the desired result can be obtained by increasing or diminishing the number of thumb-screws.

The collar or ring 6 is preferably constructed of tapering form to facilitate placing the heater thereupon, and this collar or ring is composed of any suitable metal-such as brass, copper, iron, steel, or tinwhich in the practical use of the heater is liable to become highly heated. To prevent the heated collar or ring from charring or damaging the top edge of the lamp-chimney, I line the inclined flange portion 8 with asbestos, as at- 13, which preferably extends over the inner surface of the collar or ring and its rim 9. The lining 13 may be composed of any refractory or heatresisting material, and therefore I do not confine myself to the use of asbestos.

The annular collar or ring 6 should fit practically air-tight into the opening 2 of the heater-casing, so that air will not enter to any extent at this point, as cold air passing over the top of the lamp-chimney into the hot-air chamber or reservoir tends to chill or cool the previously-heated air in the chamher or reservoir,which would be objectionable in that the air distributed into the apartment or room would not possess the desired high temperature.

The capacity of the perforations 4 in the heater-casing should be at least equal to the area of the extreme top end of the lampchimney for the purpose of distributing the hot air into the apartment or room with sufficient rapidity to prevent obstructing the legitimate work of the lamp for illuminating purposes.

Inasmuch as the essential features of the support for sustainingthe heater-casing above the lamp chimney reside in a collar part adapted to enter an orifice in the bottom of the heater-casing and a laterally-projecting flange resting upon the upper edge of the lamp-chimney, I wish it clearly understood that I do not confine myself to the exact means shown for providing the collar or ring and the laterally-projecting flange referred to, as these parts maybe otherwise constructed to secure the same result in substantially the same way without altering the character of my invention.

A desirable and important feature of my improved heater resides in the fact that the top wall of the casing is imperforate and that the'hot-air-distributing perforations lie below such top Wall, whereby the heat rising from the lamp-chimney strikes the imperforate top wall of the inner casing and is spread horizontally throughout the chamber or reservoir formed by the casing. In this manner a comparatively large volume of hot air is contained in the heater-casing and is constantly distributed laterally therefrom into the apartment or room for heating or warming the atmosphere therein.

I have by actual use of myimproved heater demonstrated that the air issuing laterally from the heater-casing is of such ahigh temperature that a comparatively small. heater applied to an ordinary lamp-chimney will comfortably heat or warm an apartment or room of moderate size in cold weather.

I prefer to construct the imperforate top wall of the heater-casing substantially horizontal and flat, but do not desire to be understood as limiting myself to this flat construction, as the wall can be arched or made dome-shaped, but it should be made imperforate or without any outlet, so that all the heat ascending from the lamp-chimney will be arrested by the imperforate top wall and caused to flow downward and laterally out from the casing, as before explained. I find from experience that if a current of cold air enters at the top of the lamp-chimney in the heater-casing and the top wall of the casing is perforated the entering cold air drives the air in the heater-casing to the ceiling before such air is thoroughly heated, and consequently the heater is objectionable and unsatisfactory in practical use.

My improved heater is not designed to entirely dispense with furnaces or similar heating apparatus for heating large rooms, but is particularly designed to economize in fuel in moderate weather, when it is desirable to maintain a low fire in the furnace or other heating apparatus.

Although I have described my invention for special use in connection with the chimney of a lamp, it will be obvious that the heater and its support can be applied to the chimneys of lVelsbach and other burners.

If the heater-casing is made of nickel-plated metal or polished brass, the polished surface is liable to become discolored or tarnished by the intense heat, and to avoid this I may arrange a horizontal imperforate plate or wall 14 in juxtaposition to the iinperforated top wall 3 of the heater-casing, so that the plate 14: will intercept the ascending products of combustion and in a measure protect the imperforate top wall 3 of the casing.

The plate or Wall 14 can be held in position in any suitable manner, but as here shown it is suspended from the top wall of the heatercasing through the medium of a wire clip having an eye 15, and the arms or branches of which extend through the wall 3 and plate or wall 14 and are bent laterally. The top Wall 3 is dished or recessed at its center to receive the wire clip, so that the latter will lie below the level of the surface of the wall 3 and not interfere with any object or vessel placed on the heater.

The eye 15 serves to receive ahook formed at either end of a lifter 16, which can be utilized to remove or replace the heater-casing while in a hot condition.

Having thus described my invention, What I claim is 1. As an improved article of manufacture, the herein-described heater for a lam p-chimney comprisinga conoidal-shaped casing 1, provided at its greater diameter with an imperforate, flat top wall 3, having a depression in the center thereof, and a series of lateral perforations 4:, in the sides of said casing below the said top wall, and a central opening 2, in its bottom, a horizontal imperforate plate 14:, arranged within the casing 1, above the said lateral perforations, and held in position by means of a clip having an eye 15, which is seated within the said depression in the flat top 3, and a suitable holder for the said cats ing adapted to support the same air-tight around its edges above a lamp-chimney, substantially' as and for the purpose described.

2. As an improved article of manufacture, the herein-described heater attachment for a lamp-chimney comprising a conoidal-sh aped casing 1, provided at its greater diameter with an imperforate, flat top wall 3, having a depression in the center thereof, and a series of lateral perforations 4, in thesides of said casing below the said top wall, and a central opening 2, in its bottom, a clip secured to the top of the casing and having an eye 15, which is seated within the said central depression. in the top, and a suitable holder for the said 66 casing adapted to support the same air-tight around its edges above a lamp-chimney, substantially as and for the purpose described.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit 6 5 nesses.

' HENRY L. DU "BOISE \Vitnessesi J. L. BAUGH,

JOHN G. PERKINS. 

